“Tiny hands and tiny feet…God has blessed us with an amazing gift! Isaiah Michael Fisher – born February 27.” the 31-year-old country star tweeted, along with a photo of her newborn son’s adorable hands and feet.

The 31-year-old pregnant entertainer opened the live awards show with a medley of her hits including “Before He Cheats,” “All-American Girl,” “Cowboy Casanova,” “Blown Away” and “Something in the Water.”

Photos of 'Mike Fisher'

Carrie Underwood tries to hold back her emotions while accepting the Gene Weed Special Achievement Award at the 2014 ACM Honors held at the Ryman Auditorium on Tuesday (September 9) in Nashville, Tenn.

“Had such a great night at the ACM Honors! Now everyone can go back to making fun of me for crying during my speech! 😜,” Carrie wrote on Instagram after accepting the Gene Weed Special Achievement Award, which honors outstanding individual achievement in the world of country music.

Carrie Underwood is interrupting your Labor Day celebrations for a very special announcement – she is pregnant with her first child!

The 31-year-old country singer announced that she and her husband Mike Fisher are expecting their first child by posting a photo of her dogs wearing shirts saying they would be becoming a “big brother” and a “big sister.”

Here is the photo’s caption: “In honor of ‘Labor’ Day, Ace & Penny would like to make an announcement. Their parents couldn’t be happier…”

Carrie and Mike, who is a professional hockey player for the Nashville Predators, got married back in July 2010.

“I truly have the best fans in the world,” the 31-year-old country singer said after beating out OneRepublic and Ellie Goulding for the fan voted award at the event, which was also attended by her husband Mike Fisher. Watch the video below!

During the evening, Carrie and Keith showed off their vocals while performing at the concert to raise money for Country Music Hall of Fame Museum’s preservation efforts, exhibitions and educational programs that teach audiences about the enduring beauty and cultural importance of country music.